Heltec (JK) 200A Smart BMS with 2A Active Balance

ArthurEld

Photon Sorcerer
I am starting a thread specific to he Heltec 200A Smart BMS with 2A Active Balance. 200A max charge. 350A max discharge
I have 4 of them and I bought them from the Alibaba Heltec store here - https://www.alibaba.com/product-detail/14-24S-200A-Smart-BMS-with_62544207027.html

edit: I forgot to mention this BMS is the same as JK brand. In fact the JK site has more up to date software that can be downloaded from play store or Apple. Check here for more info - https://www.jkbms.com/

Someone asked me to do a review of this BMS. I am not really ready to do a full review because I am new to DIY batteries and it takes me a long time to test these BMSs thoroughly. I actually have only used one so far. I am just getting ready to set up a second one.
And, I just wanted to start a place specific to this BMS so I can add my thoughts as I learn new information.
Of course I also want to hear from others using this BMS

My highest discharge current so far has only been about 70A and that was for a short time. My highest charge current was about 100A.
I hope to test a sustained discharge rate of at least 100A someday. My planned system would need changes for me to test higher than that and it could be years before I come to the conclusion that I need more amps. I don't expect that day to come but as I said I am new to this so I may change my mind someday.

I am very satisfied with this BMS so far.

The software is great.

The active balance is really cool. I had heard that 2A wouldn't be enough but my findings are that 2A is extremely useful and for my purposes I doubt 5A or 10A would be any better.
2A takes a long time but it keeps cells balanced perfectly. I can use 80% of battery capacity and be confident it will stay balanced. But, a passive balancer could probably do that too.

I love how it balances the cells perfectly whenever charging stops. It does even better when ever I am floating above the balance trigger.
Sometimes it can't completely keep up when charging / discharging high amps.
Sometimes it can't keep up in the knees. But so far it can always keep up enough so I am balanced if I only use 80% capacity and stay out of the knees.
 
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mmdb

Solar Enthusiast
Great review thx. Is this the same bms as Jk brand ? I ordered jk150-300 with 2a balancing I hope it will be good in 16s
 

ArthurEld

Photon Sorcerer
Thx Arthur..and how does gps work ,with cloud service or something else?
I never paid attention to the GPS. I know some people don't like the GPS. I probably gave it permission to use the GPS but I don't remember for sure. I will report if the next one I set up needs access to the GPS.

edit: It appears that the GPS capability is optional

I missed this part in my other picture-
1612450640041.png
 
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mmdb

Solar Enthusiast
Where to download jk android app ? I've search on Google play and can't find it ...
 

ArthurEld

Photon Sorcerer
Where to download jk android app ? I've search on Google play and can't find it ...
 

Bleedingblue

Solar Enthusiast
I am starting a thread specific to he Heltec 200A Smart BMS with 2A Active Balance. 200A max charge. 350A max discharge
I have 4 of them and I bought them from the Alibaba Heltec store here - https://www.alibaba.com/product-detail/14-24S-200A-Smart-BMS-with_62544207027.html

edit: I forgot to mention this BMS is the same as JK brand. In fact the JK site has more up to date software that can be downloaded from play store or Apple. Check here for more info - https://www.jkbms.com/

Someone asked me to do a review of this BMS. I am not really ready to do a full review because I am new to DIY batteries and it takes me a long time to test these BMSs thoroughly. I actually have only used one so far. I am just getting ready to set up a second one.
And, I just wanted to start a place specific to this BMS so I can add my thoughts as I learn new information.
Of course I also want to hear from others using this BMS

My highest discharge current so far has only been about 70A and that was for a short time. My highest charge current was about 100A.
I hope to test a sustained discharge rate of at least 100A someday. My planned system would need changes for me to test higher than that and it could be years before I come to the conclusion that I need more amps. I don't expect that day to come but as I said I am new to this so I may change my mind someday.

I am very satisfied with this BMS so far.

The software is great.

The active balance is really cool. I had heard that 2A wouldn't be enough but my findings are that 2A is extremely useful and for my purposes I doubt 5A or 10A would be any better.
2A takes a long time but it keeps cells balanced perfectly. I can use 80% of battery capacity and be confident it will stay balanced. But, a passive balancer could probably do that too.

I love how it balances the cells perfectly whenever charging stops. It does even better when ever I am floating above the balance trigger.
Sometimes it can't completely keep up when charging / discharging high amps.
Sometimes it can't keep up in the knees. But so far it can always keep up enough so I am balanced if I only use 80% capacity and stay out of the knees.



Do you think this is similar or better than the chargery?
 

ArthurEld

Photon Sorcerer
I think this is better for up to about 130A charging and 200A discharging
For more amps than that Chargery is probably better.

This is my first BMS so I'm not the best for comparing. I just know I like the BMS and the active balance.

I know there are BMSs that can handle more amps and active balancers that are much faster but I'm good with this.
 

ArthurEld

Photon Sorcerer
I have been having trouble with the first Heltec BMS. It gives me a CPU warning and it won't allow me to turn on charging or discharging.
This problem started before China's New Year so I had to wait. That wasn't a big deal for me because I have 4 Heltec BMSs and I am not using them all yet.

Although it is sad that one of my BMSs died, Heltec is standing by their product and sending me a replacement. I have heard some people say that JK BMS company won't answer their emails. So, I assume that buying from Heltec instead of JK is the better choice.

I will report my experience with the replacement BMS after I get it.
 

ArthurEld

Photon Sorcerer
I received my replacement BMS yesterday.
And I still haven't sent back the old one.
Michelle asked me to send the broken one but I haven't gotten to it yet.
Since I had to wait though Chinese New Year they can wait.
Sorry @upnorthandpersonal you don't get to tear apart my broken BMS
 

Huck

Watts are Universal
I have a 200a 2a balance bms and I purchased the 10a active balancer at the same time.
I have to say, the BMS is the best I have come across yet!
Much better than Daly's.
 

Sanwizard

Photon Sorcerer
I have a 200a 2a balance bms and I purchased the 10a active balancer at the same time.
I have to say, the BMS is the best I have come across yet!
Much better than Daly's.
I have one in the house and another on the way. Still waiting for frigging batteries! Those LA dock workers need to step up and get those ships unloaded!
 
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